Oceaneering officer proposes $999K share sale

The approximate sale date is May 12, 2026, with Fidelity Brokerage Services LLC listed as the broker.

Accepted by SEC EDGAR 05/12/2026 - 04:21 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Oceaneering International Inc. (OII) officer Martin J. McDonald gave notice of a proposed sale of 26,053 common shares, with an aggregate market value of $998,679.77. The approximate sale date is May 12, 2026, and Fidelity Brokerage Services LLC is listed as the broker. Acquisition entries include restricted stock vesting from the issuer.

Key Figures

Shares proposed for sale: 26,053 shares Aggregate market value: $998,679.77 Shares outstanding: 99,745,249 shares

3 metrics

Shares proposed for sale 26,053 shares Proposed sale by Martin J. McDonald

Aggregate market value $998,679.77 For the shares listed for sale

Shares outstanding 99,745,249 shares Issuer shares outstanding figure in the securities information

Key Terms

Restricted Stock Vesting, Aggregate Market Value, Shares Outstanding

3 terms

Restricted Stock Vesting financial

"Nature of Acquisition Transaction: Restricted Stock Vesting"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

Aggregate Market Value financial

"Aggregate Market Value"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

Shares Outstanding financial

"Number of Shares or Other Units Outstanding"

Shares outstanding are the total number of a company’s stock units held by all shareholders, including institutional investors and company insiders — think of them as the total number of slices of the company’s ownership pie. Investors use this number to calculate how much of the company each share represents, and it directly affects per-share measures like earnings per share, ownership percentage and valuation; when the slice count changes, an investor’s claim and the company’s per-share metrics change too.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many OII shares does Martin J. McDonald propose to sell?

Martin J. McDonald, an officer of Oceaneering International Inc., gave notice of a proposed sale of 26,053 common shares, listed at an aggregate market value of $998,679.77. Fidelity Brokerage Services LLC is the named broker.

When is the proposed OII share sale scheduled?

The approximate date of sale is May 12, 2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001661420
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	OCEANEERING INTERNATIONAL INC
SEC File Number	001-10945
Address of Issuer	5875 NORTH SAM HOUSTON PARKWAY WEST SUITE 400 HOUSTON TEXAS 77086
Phone	713-329-4500
Name of Person for Whose Account the Securities are To Be Sold	MCDONALD MARTIN J
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	26053	998679.77	99745249	05/12/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	02/20/2009	Restricted Stock Vesting	Issuer			786	02/20/2009	Compensation
Common	02/23/2010	Restricted Stock Vesting	Issuer			2400	02/23/2010	Compensation
Common	02/22/2011	Restricted Stock Vesting	Issuer			2000	02/22/2011	Compensation
Common	02/21/2012	Restricted Stock Vesting	Issuer			2200	02/21/2012	Compensation
Common	02/19/2013	Restricted Stock Vesting	Issuer			2200	02/19/2023	Compensation
Common	06/21/2013	Restricted Stock Vesting	Issuer			24	06/21/2013	Compensation
Common	09/23/2013	Restricted Stock Vesting	Issuer			18	09/23/2013	Compensation
Common	12/23/2013	Restricted Stock Vesting	Issuer			19	12/23/2013	Compensation
Common	02/25/2014	Restricted Stock Vesting	Issuer			2400	02/25/2014	Compensation
Common	03/21/2014	Restricted Stock Vesting	Issuer			20	03/21/2014	Compensation
Common	06/23/2014	Restricted Stock Vesting	Issuer			29	06/23/2014	Compensation
Common	08/29/2014	Restricted Stock Vesting	Issuer			100	08/29/2014	Compensation
Common	12/22/2014	Restricted Stock Vesting	Issuer			38	12/22/2014	Compensation
Common	02/24/2015	Restricted Stock Vesting	Issuer			2000	02/24/2015	Compensation
Common	03/23/2015	Restricted Stock Vesting	Issuer			44	03/23/2015	Compensation
Common	06/22/2015	Restricted Stock Vesting	Issuer			57	06/22/2015	Compensation
Common	09/21/2015	Restricted Stock Vesting	Issuer			65	09/21/2015	Compensation
Common	12/21/2015	Restricted Stock Vesting	Issuer			72	12/21/2015	Compensation
Common	02/22/2016	Restricted Stock Vesting	Issuer			1870	02/22/2016	Compensation
Common	02/20/2017	Restricted Stock Vesting	Issuer			1105	02/20/2017	Compensation
Common	02/19/2018	Restricted Stock Vesting	Issuer			1534	02/19/2018	Compensation
Common	02/18/2019	Restricted Stock Vesting	Issuer			5312	02/18/2019	Compensation
Common	02/24/2020	Restricted Stock Vesting	Issuer			1760	02/24/2020	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	05/12/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Gerardo Ibarra-Munoz, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Martin Mcdonald
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)